package top.shiyiri.servlet;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author Aunean
 * @date 2022/1/27 12:02
 */

public class ContextServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.获取web.xml中配置的上下文参数context-param
        ServletContext context = getServletConfig().getServletContext();

        String username = context.getInitParameter("username");
        System.out.println("context-param参数username的值是：" + username);
        System.out.println("context-param参数password的值是：" + context.getInitParameter("password"));

        //2.获取当前工程路径，格式：/工程路径
        System.out.println("当前工程路径：" + context.getContextPath());
        //3.获取工程部署在服务器硬盘上的绝对路径
        System.out.println("工程部署的路径是：" + context.getRealPath("/"));
        System.out.println("工程下css目录的绝对路径是：" + context.getRealPath("/css"));
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);//调用doPost()
    }
}
